stafford



Patented Feb. 24, 1885.

INVENTUR: ewzm 0% ATTQRNE '(ModeL) G. PLLANG & 0. G. STAFFORD.

GOUPLING DEVICE FOR SAND POINTS IN DRIVE WELLS.

UNITED STATES PATENT FFl'ClTZQ GHARLEY F. LANG AND ORLANDO G. STAFFORD, OF RISING CITY, NEE.

COUPLING' DEVICE FOR s Aue eei-ms IN DRIVE WELLS.

SPECIFICATION forming part of Letters Patent No. 312,867, dated February Application filed August 2, 188i. (Model) To aZZ whom it may concern.-

Be itknown that we, QHARLEY F. LANG and ORLANDO O. Srnrnonn, of Rising City, in the county of Butler and State of Nebraska, have invented a new and Improved Coupling Device for Sand-Points in Drive-Wells, of which the following is a full, clear, and exact description.

The object of our invention is to save the time and labor required for withdrawing the sand-points used in driving wells; and it con sists in a coupling device that allows the disconnection of the sandpoint from the pump, as hereinafter described and claimed.

. Reference is to be had to theaccompanying drawings, forming a part of this specification,

in which similar letters of reference indicate attachment to the corresponding parts in all the figures.

Figure l is a longitudinal section of the.

coupling device. Fig. 2 is a side view of one portion, and Fig. 3 is an end view of the other portion.

The coupling device consists of two parts, A 13, both of tubular form, and connected end to end by a left-hand thread at a, the joint being packed to prevent leakage. The parts A B have right-hand threads at their ends for The part B is made with a flange or rim, 0, and to the part Ais attached a tapering shield, c, that extends over the flange b. The flange serves to retain the pipe in the center of the well, sothat the upper part will not miss the screw when inserted in the well.

pump-cylinder and tubing.-

To prevent any possibility of the parts unscrewing except at the screw-joint a, the setscrews d are provided at the other couplings for clamping the pipes.

Having thus described our invention, we claim as new and desire to secure by Letters 'Patent-'. i

l. The coupling device for drivewells, con sisting of the parts A B, having right-hand screw-threads at their outer ends and connected by a left-hand screw, substantially as described.

2. The combination of the tube A, tube 13, formed with flanges b, and the shield 0, substantially as described, forming a coupling for use between a pump and sand-point in driven wells, as specified.

' OHAR-LEY F. LANG.

O13 LANDO C. STAFFORD.

Witnesses:

.l'. O. NYcUM, Giro. L. MATTER. 

